[S390] cio: change locking in io_subchannel_remove

IO subchannels are always unregistered in process context, so use
spin_lock_irq in the corresponding remove callback.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index bd6e8cf..dc97cb9 100644 (file)
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1065,17 +1065,16 @@ static int
 io_subchannel_remove (struct subchannel *sch)
 {
        struct ccw_device *cdev;
-       unsigned long flags;
 
        cdev = sch_get_cdev(sch);
        if (!cdev)
                goto out_free;
        io_subchannel_quiesce(sch);
        /* Set ccw device to not operational and drop reference. */
-       spin_lock_irqsave(cdev->ccwlock, flags);
+       spin_lock_irq(cdev->ccwlock);
        sch_set_cdev(sch, NULL);
        cdev->private->state = DEV_STATE_NOT_OPER;
-       spin_unlock_irqrestore(cdev->ccwlock, flags);
+       spin_unlock_irq(cdev->ccwlock);
        ccw_device_unregister(cdev);
 out_free:
        kfree(sch->private);